The Astom Martin pads also fit the calipers as SiFab says give the right offset, thank you SiFab we are now sorted.
Mintex MGB 522 pads as fitted to Astom Martin/Volvo

You can see the material offset and the pads are larger.

[Linked Image]DSC_0627 by Robert & Ali Davies, on Flickr
[Linked Image]DSC_0634 by Robert & Ali Davies, on Flickr

Morgans 1934 MX, 1947 Series 1, 1956 +4 TR4, 2000 +4 T16
Triumph Herald 1969 13/60
Morris 1970